Product Data Sheet Safety Data Sheet Show all documents
Sika® Watertight Concrete Powder

Sika® Watertight Concrete Powder

PERMEABILITY REDUCING ADMIXTURE

Sika® Watertight Concrete Powder is a combined water-resisting and HRWR/Superplasticizing admixture used to enhance the workability and reduce the water permeability of concrete. When added to concrete, the HRWR component in the admixture allows for the reduction in the water-cementitious ratio and reduces the large capillary pores in the concrete; the pore blocking component blocks the remaining small capillary pores by forming a hydrophobic layer within the pores.

  • Reduces water absorption
  • Reduces water penetration
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sika® Watertight Concrete Powder has been specifically formulated to produce high quality watertight concrete. Typical applications include:
  • Water retaining structures
  • Below ground structures
  • Residential foundations
  • Swimming pools
  • Lift pits
  • Tunnels, etc.
  To improve concrete’s resistance to water permeability, it is recommended that along with the use of Sika® Watertight Concrete Powder, the concrete should have a minimum cementitious content of 350 kg/m3 (590 lb/yd3) and a maximum water/cement ratio of 0.42.

Advantages

  • Reduces water absorption
  • Reduces water penetration

Packaging

1.34 kg (2.95 lb) water soluble bags, in boxes of 10

Colour

White powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika® Watertight Concrete Powder meets requirements of ASTM C494 Type F, ASTM C494 Type S and is ANSI/NSF 61 certified.
Product Information

Shelf Life

2 years when stored in original, unopened packaging, in dry warehouse conditions at temperatures between 5 and 27 °C (40 and 80 °F). Protect from moisture.

Storage Conditions

Store at temperatures above 5 °C (40 °F). Protect from direct sunlight.

 

Application

Application Information

Mixing

Truck mixers should be free from all contaminants prior to the batching of concrete containing Sika® Watertight Concrete Powder.

  • Sika® Watertight Concrete Powder should be added to the mixer at the recommended dose.
  • Batched concrete mix constituents should be subsequently batched on to the Sika® Watertight Concrete Powder.
  • Additional mixing water should then be dispensed to bring the concrete to the desired consistency.
  • Upon completion of the batching procedure, the concrete load should be mixed in the truck mixer on full revolutions for a minimum of five (5) minutes to ensure that the optimum consistency has been achieved.
  • The w/c ratio and consistency control are the responsibility of the concrete producer. Laboratory trials are recommended to evaluate and confirm the actual water reduction.

  

Combination with Other Admixtures: Sika® Watertight Concrete Powder is compatible with other Sika admixtures. All admixtures should be added separately to the concrete mix. Contact your local Sika Canada Technical Sales Representative for further information.
Combination with Pozzolanic Materials: Sika® Watertight Concrete Powder can be successfully used in mix designs utilizing pozzolanic materials such as silica fume, fly ash and GGBFS.
Concrete Mix Design: Depending on the mix design, water reductions typically between 10 - 16 % can be achieved. Laboratory trials are always recommended to evaluate and confirm actual water reduction. Should the addition of a HRWR/Superplasticizer be required, it is recommended that a Sika® ViscoCrete® HRWR/Superplasticizer be selected. Contact your local Sika Canada Technical Sales Representative for further information.

Note: Results may vary with different materials, temperature conditions and testing practices.

      

350 kg/m3 (590 lb/yd3) of Cement Content (Type GU)   

Admixture

Dosage

W/cm Ratio

Cement Content kg/m3

Slump

Control

-

0.50

350

110 mm (4.5")

Sika® Watertight Concrete Powder

1.75 kg/m3

0.42

350

110 mm (4.5")

Admixture

Compressive Strength

Compressive Strength

Water Reduction %

7 days MPa

28 days MPa

Control

28.6

43.1

-

Sika® Watertight Concrete Powder52.160.216

  

400 kg/m3 (675 lb/yd3) of Cement Content (Type GU)

Admixture

Dosage

W/cm Ratio

Cement Content kg/m3

Slump

Control

-

0.46

400

125 mm (5")

Sika® Watertight Concrete Powder

1.75 kg/m3

0.42

400

125 mm (5")

Admixture

Compressive Strength

Compressive Strength

Water Reduction %

7 days MPa

28 days MPa

Control

53.1

48.0

-

Sika® Watertight Concrete Powder57.460.916
Consumption

Recommended Dosage

The recommended dosage of Sika® Watertight Concrete Powder is

1.75 kg/m3 of concrete material. In the event of part loads of less than one (1) cubic metre, it is recommended that a one cubic meter dose (1.75 kg/m3) of Sika® Watertight Concrete Powder be used. Contact your Sika Canada Technical Sales Representative for further information.

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